The technology industry is fighting against President Donald Trump's travel ban.

The controversial executive order prohibits travelers from seven Muslim-majority countries from entering the U.S. for 90 days. It stops admission of all refugees for 120 days. Syrian refugees are blocked indefinitely.

The tech companies' filing highlights how they depend on immigrant labor. It says the executive order "is inflicting substantial harm on U.S. companies" by increasing business costs and making it harder to find employees.

The brief continues, "The Order also could well lead to retaliatory actions by other countries, which would seriously hinder U.S. companies' ability to do business or negotiate business deals abroad. Many companies do business in one or more of the countries currently covered by the Order."